Improvement in pump-valves



A. s. (Hummme Patented Nov. i'01874.

Grrrcn.

ADAM S. CAMERON, OF NEW YORK, N. Y.

EMPROVEWIENT IN PUMP-VALVES.

Specification forming part of Letters Patent No. 156,769, dated November10, 1574; application tiled October '7, 1874.

To all whom t may concern:

Beit known that I, Anni/r S. CAMERON, of the city, county, and State ofNew York, have invented acertain new and useful .Improvement inPump-Valves, of which the following is a specification:

This invention relates to certain improvements on that class of valveswhich I have described in my patents, No. 61,155, dated January 15,1867, and No. 72,363, dated December 11, 1867.

My present improvement consists in a spindle which extendsthrough theupper valve and into a socket formed in a stem projecting from the underside ot the lower valve, said spindle being provided with a shoulder,which bears aga-insta packing-piece situated in a recess in the back ofthe upper valve, while the tubular stem ot' the lower valve is guided ina hollow plug that rises from the bottom ot' the valve-chamber, each ofthe valves being exposed to the action of a spring, in such a mannerthat the necessity of central bearings in the valve-seats is avoided,leaving a clear circular opening for the passage of the liquid, and atthe same time the valves are supported both above and below their seats,and leakage between the valves and their guide rods or spindles isprevented.

This invention is illustrated in the accompanying drawing,in whichFigure 1 represents lalongitndinal vertical section of a valve-cham bercontaining my improved valve. a transverse section of the same.horizontal section of the same.

Similar letters indicate corresponding parts. In the drawing, the letterA designates the valve-chest of a pump, in which are situated thevalve-seats B B', one above the other. These valve-seats are formed ofrings cast ot' brass or other suitable material, and they are secured inthe valve-chest by turning their outer edges conical, and driving themdown in correspondingly conical sockets in the chest; or they may besecured in any desirable manner. The faces of the seats B B are provided'with annular grooves to receive rings a a, of leather or other suitablematerial, which are placed edgewise and so as to break joints, the upperedges of said rings being faced ott' to form the seats for the valves()C. It' one of Fig. 2 is Fig. 3 is a these seats should wear out, it caneasily be refaced or entirely renewed without disturbing the metallicportions B B ofthe seats. If desired, however, the rings a a, may beinserted into the bodies ot' the valves, instead of placing them intorecesses in the seats B B.

This arrangement of forming the faces ot the valves or of the seats Ihave fully described in my patent, No. 61,155, datedJanuary l5, 1867.

The valves C C are guided by a spindle, D, the upper end of whichextends into ahollow plug, E, secured in the top of the valve-chest,while its lower end extends into a socket, F,

formed in the stem Gr of the lower valve O',l

said socket being closed at the bottom, and being of such depth that thevalve O can rise on the spindle. The stem G of said valve is guided in atubular plug, H, which is secured in the bottom of the valve-chest. Aspring, I, which is Wound round the spindle D, has a tendency to depressthe valve C on its seat. This spring bears against the end of the hollowstem of the upper valve O. In the back of this upper valve is formed arecess, b, to receive a packing-piece, c, and on the spindle D is formeda shoulder, d, which bears on this packing-piece, to prevent leakagebetween the valve and the spindle. A spring, J, which is wound round theupper part of the spindle D, serves to depress the shoulder d on thepacking-piece o, and it also has a tendency to keep the valve O down onits seat B. By these means the valves O C are supported both above andbelow their seats, while leakage between the upper valve and the spindleis prevented by the shoulder d and packing-piece c, and between thespindle and the lower valve no leakage can take place, since the socketin the stem ot' said lower valve is closed at the bottom. At the sametime the space inside of the valve-seats is left entirely unobstructedfor the free passage of the water. In some cases it may be desirable todispense with the tubular plug H below for guiding the spindle. In suchcases I guide the spindle on a center supported by arms secured in theseat of the upper valve O. In either case the spindle moves with uppervalve, and is guided above and below this valve, and the arrangement isapplicable where only one valve is required, such as in singleaetingpumps.

What I elaim as new, and desire to secure by Letters Patent, is-

1. The spindle D, supported at one end in a tubular plug in thevalve-chest, and at its opposite end in a socket formed in the stem ofthe lower Valve C', said spindle being provided With a shoulder bearingon a packingpieee in the back of the upper Valve C, in coinbination withthe valves C C', and with a tubular plug, H, forming a guide for thestem of the lower Valve, all constructed and operating substantially inthe manner shown and described.

2. The Valve C, .placed loosely on the spindle D, in combination withsaid spindle, which is provided with a shoulder, d, bearing on the backof the valve, and which is guided both above and below said valve, tooperate in re speet to a valve, C', substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand andseal this 30th day of September, 1874.

ADAM S. CAMERON [L. s]

Witnesses: v

W. HAUFF, E. F. KASTENHUBER.

